Corns are a thickening of the stratum corneum induced by long-term pressure and friction, often causing pain when standing or walking. Corns are generally not recommended for self-treatment, and can be treated with topical medications, physical therapy, and surgical excision. 1. Topical medication: The general treatment is to apply corrosive medication, such as 50% salicylic acid ointment, to make the thickened skin cuticle fall off. 2. Physical therapy: Physical therapy such as laser, freezing, etc. can also be used to remove the thickened keratin. 3. Surgery: If necessary, the corns can be removed by surgery. It is recommended that patients with corns go to the hospital in a timely manner, under the guidance of the doctor for standardized treatment, the drug should be used as prescribed by the doctor.